Elf France

Atochem

Elf-union

Jean-Claude Fayard

Paul Maldonado

Robert Leger

Pierre Durual

Marc Hermant

Robert Nouguier

Dominique Basset

Laurent Germanaud

Guy Negre

Valve assembly (22) intended for closing a combustion chamber (14) of an internal-combustion engine and comprising a valve (36) and a valve seat (42), the valve lifting off from its seat in order to open the combustion chamber (14) by moving away from the latter. According to the invention, the valve seat (42) is designed to move relative to the combustion chamber (14) under the effect of the pressure prevailing in this chamber and thereby to reinforce the closing of the valve assembly.

Valve assembly for internal-combustion engines

The present invention relates to a device for adjusting the camber angle of the wheel of a vehicle, the rotary axle of which is mounted on the hub carrier (12), at least one of the ends of which is movable in terms of a shift relative to a vertical plane passing through the axis of symmetry of the wheel, characterized in that this end is mounted in an eccentric movable in rotation on one of the fastening points of the arm (12) on a suspension device of the wheel (10, 11), the eccentric being driven in rotation as a function of the angle of lock of the wheels or of the suspension height.

Device for adjusting the camber angle of a vehicle

A device for improving the feed of diesel engines at low temperatures, particularly at temperatures less than the cloud point of gas oils, without modifying the specific chemical characteristics of the gas oil by recycling the scavenging flow from the injection pump, characterized in that recycling takes place either upstream of the fuel filter and is associated with recirculation towards the reservoir of the gas oil coming from the reservoir through a heat exchanger or directly in the direction of the reservoir with direct feed of the filter by the reservoir.

Device for improving the feed of diesel engines at low temperatures

In order to improve the wear resistance properties of lubricants, at least one compound of the following formula is incorporated therein: ##STR1## Rf is a perfluorinated radical, a=0 to 10,

Lubricants and new polyfluorinated compounds which can be used as

Device for controlling the circulation of gases from and towards an internal combustion engine, wherein a sealing ring is provided with means for injecting a lubricating and cooling liquid such as oil in the gap between a continuous sealing surface around a passage within a sealing ring and the external surface of a rotary throttle, this device being applied to the high pressure and high temperature sealing of rotary throttle for four stroke engines.

Device for controlling the combustion chambers exhaust and/or intake for

Device for controlling the evacuation of exhaust gases of a combustion chamber in an internal combustion engine. A rotary valve performs a continuous or alternate turning movement and synchronized with the rotation of the motor about an axis parallel to the axis of rotation of the motor and issues at the level of its transversal channel on one side on an orifice connected to the exhaust towards the outside. The invention is applied to the control of the exhaust of two stroke engines.

Device for controlling a gas circuit of a combustion chamber and a

Ethers of polyols are prepared by reaction of a polyol and an organic chloride in a two phase medium in the presence of a phase transfer catalyst. The ethers of polyols are useful as synthetic lubricants, as lubricant bases, as lubricant additives and as fuel additives.

Ethers of polyols, their preparation and use

Apparatus permitting an improvement of the carburetion of internal combustion engines fitted downstream of a multibody carburetor and upstream of the induction manifold. The primary homogenization chamber forming an extension of the primary body issues tangentially via an orifice into the top of the secondary homogenization chamber, namely into an annular space defined by the walls of the secondary chamber and the secondary mixture supply pipe. The secondary chamber is equipped in such a way as to form a homogenizer and to this end has fixed vanes. Application to automobiles.

Growing community of inventors

Lyons, France

Jean-Claude Fayard